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post #2571 of 3582
Quote:
Originally Posted by Arizonian View Post

Keep in mind stock voltages can vary from same vendor on same GPU. Not sure why it does. headscratch.gif
Example is my EVGA GTX 580 SC card came default stock voltage at 1.0880mV. I've seen others between 1.0500mV - 1.0750mV, exact same card. Go figure.

Zotac is having a massive backlash because of this "blanket voltage" they gave all their cards. The voltage of each card is set for what that perticular chip needs to be stable at a given clockspeed. My matrix and anothers i know also have different voltages for the same core speed. His chip also runs cooler than mine and gets a higher oc than mine. Zotac released a bios update to counter this oversite which raises the voltage in dx11 (where the crashing was occuring) apps but from what ive read it was another blanket voltage increase which caused significant heat increases to many users and also did not correct the dx11 crashing for all.

Now my matrix is at 1.063v while the other guys is 1.035v for (stock) 816core. Using afterburner i can lower my voltage down to 1.035 and ive seen no problems but im sure during testing my chip was unstable at the lower voltage. Also his card can oc to 1035 where as mine is at best 1027, mostly 1017core and stable. I would think much like a cpu, the better the quality of the chip the higher the oc potential and lower voltage and having less heat.
post #2572 of 3582
This is common when they bin the chips for SC speeds. The most common voltage for SC cards I have seen posted is 1.088. Which seems high for a 25mhz OC. My vanilla card came stock at 1.0v
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post #2573 of 3582
My vanilla evga came with a 1.013 stock vcore. I think this is the best indication of how well the chip will clock.
I have flashed my BIOS different times, using the stock one as a template, and only changing a few parameters. I wonder how that works with the fan speed unlocker from evga. Does it only over-write certain areas of BIOS, and leave the rest untouched? Otherwise they would wipe out peoples factory voltages and speeds.

Shadow - thanks for the info on the memory. I never thought of how it would impact the overall performance of the card for a given core speed. I wonder if that has anything to do with my issues. Hopefully ill get some time to do more testing today. I hope my luck is as good as it was yesterday.
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post #2574 of 3582
I don't know about that. Most eVGA GTX 580 SuperClockeds (not the vanilla, I know) seem to run with a VID of 1.088v yet obtain substantially different overclocking results.

Some people need the whole 1.088v to hit 850MHz stable with these cards but I can do it with 1.025v. At stock voltage I can get up to 930MHz stable with a memory clock of 2100MHz (past that it starts artifacting). I still think most of the overclocking capability has to do with luck of the draw that comes down to the GPU core you get on your card.
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post #2575 of 3582
Quote:
Originally Posted by Arizonian View Post

You mean the EVGA Firmware Update + Fanspeed Unlocker ?

It didn't change it at all. It came to me at this stock setting 1.0880mV. I lowered it for a little while to reduce the temps a couple degrees, however it came with a wake from sleep issue (at least I thought it was the culprit) because I went too low at 1.0500mv.

I don't think the firmware / fan unlocker came with any voltage tweaks to anyone's cards, unless I'm mistaken.


Yeah, I was curious if it retained voltages. I know that it unlocked my fan speeds and I was able to tweak a new custom fan profile from the EVGA Precision application and get myself a much cooler running card. It's noisy as heck now, but it never goes above 77C where before it used to hit 95C at times.

 

I'd like to change my fan profiles in the BIOS directly, so that I can save a bit on GPU resources by not having it software controlled. Perhaps I can back up this BIOS and then modify the fan settings (and only the fan settings) in the factory BIOS?

 


 

Quote:
Originally Posted by lightsout View Post

This is common when they bin the chips for SC speeds. The most common voltage for SC cards I have seen posted is 1.088. Which seems high for a 25mhz OC. My vanilla card came stock at 1.0v


This is very good to know, thanks! My 580 Superclocked card came stock at 1.063V so I guess that I got lucky! (And it does seem to correlate to my relatively high stable clocks.)
 

Quote:
Originally Posted by mxthunder View Post

My vanilla evga came with a 1.013 stock vcore. I think this is the best indication of how well the chip will clock.
I have flashed my BIOS different times, using the stock one as a template, and only changing a few parameters. I wonder how that works with the fan speed unlocker from evga. Does it only over-write certain areas of BIOS, and leave the rest untouched? Otherwise they would wipe out peoples factory voltages and speeds.

Shadow - thanks for the info on the memory. I never thought of how it would impact the overall performance of the card for a given core speed. I wonder if that has anything to do with my issues. Hopefully ill get some time to do more testing today. I hope my luck is as good as it was yesterday.


From the above posts, I am fairly certain that it only has a change for the fan speed minimums and maximums and may also change the hardware fan speed amounts. It didn't affect my clock speeds or voltages. You're welcome about the memory. I couldn't find a straight answer when I googled for it (and searched for it here) so I sat around playing in 3DMark11 and Heaven with dozens of runs at different memory speeds to find out what was ideal. Oddly enough, when I used Excel (actually Libre Office Calc) to plot a trend-line, it matched what EVGA was doing from the factory with the reference, SC, and Classifieds.

 

For what it's worth, Heaven gives more repeatable results than 3DMark11 seems to. (This may be due to Physics)

 



Quote:
Originally Posted by friend'scatdied View Post

I don't know about that. Most eVGA GTX 580 SuperClockeds (not the vanilla, I know) seem to run with a VID of 1.088v yet obtain substantially different overclocking results.

Some people need the whole 1.088v to hit 850MHz stable with these cards but I can do it with 1.025v. At stock voltage I can get up to 930MHz stable with a memory clock of 2100MHz (past that it starts artifacting). I still think most of the overclocking capability has to do with luck of the draw that comes down to the GPU core you get on your card.


 

Yeah, luck of the draw on the GPU and also how well-built all of the regulator circuits are. (VRM) However, if you start pushing the card in -advmethods Fermi folding WUs you're going to see Error 52 NANs at stock voltages at your settings.


Edited by shad0wfax - 12/31/11 at 3:05pm
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post #2576 of 3582
Quote:
Originally Posted by shad0wfax View Post

Yeah, luck of the draw on the GPU and also how well-built all of the regulator circuits are. (VRM) However, if you start pushing the card in -advmethods Fermi folding WUs you're going to see Error 52 NANs at stock voltages at your settings.

Not impossible. Heaven- and game-stable is more than enough for me, though, since this isn't a folding machine.

I mean I can "pass" Heaven at 950MHz at stock voltage but once I throw in 4xAA it errors out like crazy. 930MHz passes 5+ loops of Heaven no problem with the AA thrown in, which has been more demanding for the card (in my experience) than Futuremark software or Furmark. That's enough for me.
Edited by friend'scatdied - 1/1/12 at 8:22am
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post #2577 of 3582
Hi guys!

Im having trouble OC my vanilla evga reference 580's. they seem to require really high volts to even get a moderate oc! they seem to need 1.1v for just 855/1710/2106. at this setting I can run loops of heaven benchmark no problem but crashes in like the 5th loop of 3dmark 11.. Temps never go above 55 for both cards frown.gif
Driver stops responding followed by a hard lock. Running 290.36 betas

is 1.1v even safe for a reference 580 24/7? Especially considering such a low oc for that voltage.. frown.gif

Another thing it seems my cards have high vids. frown.gif one is 1.013 and the other is 1.050 for vanilla stock speeds frown.gif

am i SOL?

Running Asus rampage 3 extreme with the antec HCP-1200. Do i need to plug in the extra PCI EZ PLUG EXTRA POWER molex plugs on this board for overclocking just 2 cards?

also should I up my PCI frequency from default 100 or bump a voltage in my bios for my 4.0ghz i7 like the IOH PCIE or IOH? Will that help maybe stableize or not even make a difference.

MY OC Settings...

i7930 @ 4.0ghz
x21
blk 191
Dram 1531MHZ
UCLK 3063MHZ
QPI 6893MHZ
CPU and QPI Loadline enabled

vcore 1.200v
CPU PLL 1.800v
QPI/DRAM 1.29v
Dram 1.5v
IOH 1.164v

everything else auto...

Thanks in advance for any help! smile.gif
Edited by criskoe - 1/1/12 at 6:55am
post #2578 of 3582
Need a advice looking for SLI my 580 Lightning but i cant find them anymore....I can find a Gigabyte 580 SoC, it will be a good match for my lightning? Or i will loose some OC potencial?

Thanks
post #2579 of 3582
Quote:
Originally Posted by criskoe View Post

Hi guys!
Im having trouble OC my vanilla evga reference 580's. they seem to require really high volts to even get a moderate oc! they seem to need 1.1v for just 855/1710/2106. at this setting I can run loops of heaven benchmark no problem but crashes in like the 5th loop of 3dmark 11.. Temps never go above 55 for both cards frown.gif
Driver stops responding followed by a hard lock. Running 290.36 betas
is 1.1v even safe for a reference 580 24/7? Especially considering such a low oc for that voltage.. frown.gif
Another thing it seems my cards have high vids. frown.gif one is 1.013 and the other is 1.050 for vanilla stock speeds frown.gif
am i SOL?
Running Asus rampage 3 extreme with the antec HCP-1200. Do i need to plug in the extra PCI EZ PLUG EXTRA POWER molex plugs on this board for overclocking just 2 cards?
also should I up my PCI frequency from default 100 or bump a voltage in my bios for my 4.0ghz i7 like the IOH PCIE or IOH? Will that help maybe stableize or not even make a difference.
MY OC Settings...
i7930 @ 4.0ghz
x21
blk 191
Dram 1531MHZ
UCLK 3063MHZ
QPI 6893MHZ
CPU and QPI Loadline enabled
vcore 1.200v
CPU PLL 1.800v
QPI/DRAM 1.29v
Dram 1.5v
IOH 1.164v
everything else auto...
Thanks in advance for any help! smile.gif

Your temperatures are great for reference cards. It's not uncommon for the reference cooler to hit high 80s during load, and I'd expect sub-60 load temperatures from an Asus DirectCU or MSI Twin Frozr card.

With that said, temperatures are more important than voltage. The maximum voltage permissible on the GTX 580 per BIOS specifications is 1.15v, and you should be comfortable with up to that voltage for 24/7 use provided you can keep temperatures under control. You shouldn't even start worrying until you hit 90'C load, so 55'C is fantastic and you should feel comfortable nudging the voltage a little higher.

As with all overclocking, it's all luck of the draw. Your specific chip just doesn't seem to respond well to overclocking. PCI-Express settings shouldn't make much of a difference as long as the rest of your system is stable.
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post #2580 of 3582
Quote:
Originally Posted by criskoe View Post

Hi guys!

Im having trouble OC my vanilla evga reference 580's. they seem to require really high volts to even get a moderate oc! they seem to need 1.1v for just 855/1710/2106. at this setting I can run loops of heaven benchmark no problem but crashes in like the 5th loop of 3dmark 11.. Temps never go above 55 for both cards frown.gif
Driver stops responding followed by a hard lock. Running 290.36 betas

is 1.1v even safe for a reference 580 24/7? Especially considering such a low oc for that voltage.. frown.gif

Another thing it seems my cards have high vids. frown.gif one is 1.013 and the other is 1.050 for vanilla stock speeds frown.gif

am i SOL?

Running Asus rampage 3 extreme with the antec HCP-1200. Do i need to plug in the extra PCI EZ PLUG EXTRA POWER molex plugs on this board for overclocking just 2 cards?

also should I up my PCI frequency from default 100 or bump a voltage in my bios for my 4.0ghz i7 like the IOH PCIE or IOH? Will that help maybe stableize or not even make a difference.

MY OC Settings...

i7930 @ 4.0ghz
x21
blk 191
Dram 1531MHZ
UCLK 3063MHZ
QPI 6893MHZ
CPU and QPI Loadline enabled

vcore 1.200v
CPU PLL 1.800v
QPI/DRAM 1.29v
Dram 1.5v
IOH 1.164v

everything else auto...

Thanks in advance for any help! smile.gif

Yah those vid's aren't great. Have you tried OCing them on there own. Its normally one card holding you back. At least then you could get a baseline on each card. Thats a great vcore too on your cpu are you sure its stable?
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